The City of Frisco’s most serious crime problems were domestic violence and property crime, especially in apartment communities. The Frisco SPI assigned one Frisco police officer to the Stonebrook Village Apartments complex, which consisted of several two-story buildings containing 260 units and housing approximately 1,500 people. The officer spent his shifts primarily on or near the property. When he was off duty, the complex received routine police patrols and responses to calls for service. All but one significant change in the treatment area was expected, and several significant reductions in various call types were observed in nearby areas, suggesting a diffusion of benefits.